Pickering James D, Shepperson Benjamin, Hübschmann Bjarke A K, Thorning Frederik, Stapelfeldt Henrik
Department of Chemistry, Aarhus Univeristy, Langelandsgade 140, 8000 Aarhus C, Denmark.
Phys Rev Lett. 2018 Mar 16;120(11):113202. doi: 10.1103/PhysRevLett.120.113202.
The carbon disulphide (CS_{2}) dimer is formed inside He nanodroplets and identified using fs laser-induced Coulomb explosion, by observing the CS_{2}^{+} ion recoil velocity. It is then shown that a 160 ps moderately intense laser pulse can align the dimer in advantageous spatial orientations which allow us to determine the cross-shaped structure of the dimer by analysis of the correlations between the emission angles of the nascent CS_{2}^{+} and S^{+} ions, following the explosion process. Our method will enable fs time-resolved structural imaging of weakly bound molecular complexes during conformational isomerization, including formation of exciplexes.
二硫化碳（CS₂）二聚体在氦纳米液滴内部形成，并通过观察CS₂⁺离子的反冲速度，利用飞秒激光诱导库仑爆炸进行识别。结果表明，一个160皮秒的中等强度激光脉冲可以将二聚体排列在有利的空间取向上，这使我们能够通过分析爆炸过程后新生的CS₂⁺和S⁺离子发射角之间的相关性来确定二聚体的十字形结构。我们的方法将能够对构象异构化过程中弱结合分子复合物进行飞秒时间分辨结构成像，包括激基复合物的形成。
